Yoshimi Hundred Caves - Credit: Wikimedia Commons
The is a cluster of tombs dug in artificial caves in a tuff cliff of located in the town of Yoshimi, Saitama, in the KantÅ region of Japan. It was designated as a National Historic Site on March 7, 1923. The Schistostega luminous moss growing at the site was also designated as a Natural Monument of Japan on November 30, 1928. The site is part of Hiki Hills Prefectural Natural Park. Read more on Wikipedia
Source: en.wikipedia.org